Device for the loading of bore holes with explosive

Claim 1

A DEVICE FOR CONNECTING MULTIPLE CYLINDRICAL MEMBERS OF SUBSTANTIALLY EQUAL DIAMETER AND MAINTAINING SAID MEMBERS IN CONCENTRIC RELATION WITHIN A BORE COMPRISING A GENERALLY TUBULAR ELONGATED SLEEVE HAVING AT LEAST ONE END PORTION CONSTRUCTED OF RESILIENT MATERIAL, SAID SLEEVE HAVING AN INNER DIAMETERS OF A SIZE SNUGLY TO RECEIVE SAID CYLINDRICAL MEMBERS, A TRANSVERSE WALL IN SAID SLEEVE SPACED FROM THE OTHER END OF SAID SLEEVE AND FORMING A STOP FOR SAID MEMBERS, SAID ONE END PORTION HAVING A PORTION OF REDUCED INNER DIAMETER SPACED FROM SAID TRANSVERSE WALL AND HAVING A PLURALITY OF LONGITUDINAL SLOTS EXTENDING FROM THE END OF SAID SLEEVE THROUGH THE PORTION OF REDUCED DIAMETER AND FORMING A PLURALITY OF FINGERS, WHEREBY A FIRST CYLINDRICAL MEMBER CAN BE INSERTED IN THE OTHER END OF SAID SLEEVE UNTIL IT ENGAGES ONE SIDE OF SAID TRANSVERSE WALL AND A SECOND CYLINDRICAL MEMBER CAN BE INSERTED IN SAID ONE END PORTION UNTIL IT ENGAGES THE OUTER SIDE OF SAID TRANSVERSE WALL AND SAID SECOND MEMBER WILL ENGAGE SAID PORTION OF REDUCED DIAMETER AND MOVE SAID FINGERS RADIALLY OUTWARDLY.